[1] https://www.amazon.com/LG-49WL95C-W-49-Inch-Curved-Ultrawide...
I recall reading at least with the M1 that it's actually a physical hardware limitation with the architecture inherited from the fact that the base M1 is pretty close to the A15 which never needed to pump out to more displays.
-apple
I assume the same for just about anyone in my position.
(I'd have two Studios and an Air if it were a utopia scenario, but... that's expensive!)
I have the 2018 macbook air as my portable. It's abysmal, but I can use it to work on the couch if I have to.
I am going to try the M2 air to replace both the laptop, the mini and the eGPU. Quite a lot of hardware traded out for one single solution.
I don't like keeping multiple machines up to date and spending time doing the same updates or having to go back to one to push some branch I forgot about.
That said, I'm counting on the MBA M2 to deliver graphics to the XDR on par with the blackmagic and if it can't I may return it, get a cheaper M1 MBA and either wait out the M2 mini or pick up a studio.
I do have a second 4k monitor that I'd prefer to be able to drive--I can with the Intel box and eGPU. But I don't really use it and with the XDR it isn't really necessary.